Welding strip



June 7, 1938. M( NADER WELDING STRIP Filed Feb; 14,` 193s M J .WMU

Patented June (7, 19.38 l l UNITED STATES PATE-NT OFFICE ApplicationFebruary A14, 19136, Serial No, 63,839 In France February 19, 1935 z'oiaims. ici. 113-110) In electric arc welding. with a carbon electrode, description taken with reference to the accomor in automatic welding with the oxyacetylene panying drawing in which: torch, the welding metal has,'for some time past, Fig. 1 shows in section a section strip obtained been placed in position in the form-of section according to'the invention.

strips of metal. Fig. 2 shows the application of said section strip 'I'he manufacture of ,such section'strips ento the process of butt welding twormetal sheets. counters a certain number of drawbacks. 'I'he Figs. .3 to 6 illustrate, by way of indication, the most important is that this manufacture cannot various stages of an example of manufacture of be done vin an economical manner. In fact, as is the section strip according to Fig. 1.

IU known. it is only economically possible to start a Figs- '7 8nd 8 ShoW in Section. Section Strips 0f l0 manufacture of rolled or drawn strips ifa certain other types. tonnage is to be produced. Now, in particular in Fig. 9 shows in section a welding strip accordthe case of section strips of thekind in question, ing to the invention. provided with a cleaner. a of the smallest types, this represents, in addition llnX or addtionaflmetali5 to a considerable length of section strip, very y Fig;v 10 ShOWS the application of the Section lo great difficulties of manufacture and a. high cost. strip according to Fig. 7 to the Welding of 'tWo on the other hand, such section strip must be metal plates one of which is welded by its and extremely thin at the base or portion inserted be-V onto another. K tween the two parts to be welded, for the welding Fig. 11 shows a section Strip of another type i0 process to give good results; their sides, however, used for welding two metal plates at right angles. 20 must be of -greater thickness, but well dened, to The Welding strip Il can have. for example. in supply to the-weld a necessary but not too great cross-section the shape illustrated in Fig.`1. Said a, mass 0f Welding metal, Thrf' must also prefer- Welding Strlpfan be Used fOr butt Welding tWO ably be without vsuperficial voxide which interferes metal Plates in the manner illustrated in Fig. 2. with the weld. .'Furthe'rmorafit is necessary tor-be a weldingStr-ip Il or l being tted onto" the-edge 25 able to produce such section strips in all metals, 01' each of the tWo metal plates l2 and l2' .to be either in very costly ones such as stainless steel .joined together. which 'are then made to abut in for example, or in those which lare very difficult to the manner Shown in Fig- 2 after which the weldroll or draw, such as certain nickel steels or coping iS done in lthe usual manner. AIn order to per, for example. [It is also out of the question to obtain this welding strip'with the required cross- 30 start a manufacture which is necessarily very Section. a rolled flat band I6 of metal iS used. complex, whereas a few meters only of a-costly ShOWn ln SetlOn in Fig. v3- BY successive formmaterial, such as ne quality steel or stainless' ing, in the manner shown, for example. ln FIES- steel for example,'a'r e required. In this case, it is 4, 5 and 6. Said band of metal iS given the oi'oSS- also necessary for the section strip to `have just vSetion of Fig- 6 Which iS that of Fig. 1 Thus the- 35 suillcient weight toavoid a wasteof metal and for extremities I4 and I1 of the band I 6 are rst bent the actual manufacture of the section. strip to in opposite directions from each other as Shown give, ifpossible, no waste. y inFig. 4. Then the extremity His bent at Il in The object of the present invention isti` avoid the same direction as the other extremity I4 as .10 these drawbacks and to fumu these requirements. indicated in Fig. 5. Finally, the doubly bent air-*4o Eo'r this purpose, the section weldjg strip ae- .tremity I1 is folded back upon itself to' produce A cording to the present invention is characterized the bead I9 aS lndicatedin Fig. 6.v The SncceS- by the faot that it is obtained in. the required sive forming of the strip can be obtained in any cross-section by forming a metal band. Such suitable manner, for example by rolling, that is forming may be obtained byv rolling, pressing, to say by passing the strip between rollers, or by 45 drawing or die-forming, for example. According drawing. that iS t0 Say passing in Suitable dies. o1' to a characteristic of thev invention, the section by DreSSingfbllt of course any Other method can strip is formed so as to have an excess of matebe used and the forming of said strips could even rial constituting the welding bead. be done by hand, by hammering. either entirely During the forming of the strip, a cavity may 0l' in'pert- In the letter CaSe. for exam-Die, the '50 be reserved in one of the folds of the folded metal portion I4 ofthe section strip 0f'Flg.-1 can be in for receiving a cleaning material, a ux or a strip the extension 01' the base I5 and only be bent ot-additional metal." l back on .the plate to be welded at the time of Other advantages and peculiarities of the inusing. l

vention will becomeapparent from the ensuing The Present Section StiPere in Particular 55 characterized by the -fact that it is possible -to use a metal of absolutely any quality, cold rolled and deoxidized, for example, and of the exact thickness which is desired. In view of the factthat to obtain sheets`of metal of a very small and very accurate thickness and without oxide is a very usual and not very costly thing, it is thuspossible to obtain the required thickness for the base l5 of the section strip. On the other hand, to form the welding bead of sunlcient cross-section when such bead is necessary, the

' section strip is shaped by successively folding the metal on the side vwhere this is required, so as to meet the requirements of the welding process.

It is obvious that the section strip according to the invention can have any other shape than that shown in Fig. l and that it is given in each case the cross-section necessitated by the type oi' weld to be effected. For example, in exactly the same manner, it can be given the cross-section illustrated in Fig; '1, in order to have an additional thickness on each of the twoedges. This shape is obtained by the additional bending of the bent extremity I4 of Fig. 6 as carried 'out ,for the other extremity Il, whereby two beads I9 and I9' are obtained. Fig. 10 shows the application of this section strip to the welding of two metal sheets perpendicular to one another;

In the event of the additional thickness ob-4 tained with the'type of Fig. 1 being insufficient for making the welding bead, the band of metal could be folded back on itself twice or even more, as show n at i8', in Fig. 8, thereby enabling a welding bead oi greater thickness to be obtained if'the weld requires it.

In Fig. 1l, the use has been shown of a strip of suitable shape for welding two metal plates perpendicular to each other and forming an angle, for example the sides of -a box. In this case the bent extremity il is folded back upon itself at 2l to produce bead 2|.

Finally. as illustrated in Fig. 9 the two sides of a fold of the sheet metal may not be folded completely against each other, so as to leave a certain hollow 22, in which can be introduced a cleaning substance, a iiux or a strip of additionalv metal I3, for example of aluminium.

It is obvious that the invention has only been.

welded together with the weld-insert overlying adjacent sides of one of said pieces of metal, welding said pieces of metal and the weld-insert together and causing at least some of the excess metal provided by said fold to reinforce the welded joint between said pieces of metal. l

2. A weld-insert comprising an angular member folded from a piece of flat metal and having adjacent sides adapted to overlie adjaCent'sides of a piece of metal to be welded to another piece of metal, saidmember being folded upon itself at least twice to provide a plurality of contiguous folds adjacent the angle formed by its said adjacent sides, whereby when said pieces of metal are welded together, said folds will provide an excess of m'etal at the joint between said-pieces of metal.

' MAURICE NADER. 

